"Reece Dunn" <msclrhd@hotmail.com> wrote:
Scott Schurr wrote:
I suspect that there's a problem with the size of the literals on the 64-bit compilers. Does one declare a 64-bit literal by appending a double L ('LL')? If so, then I'll give that a try.
This will depend on the compiler. I am not sure what GCC does, but for MS (and compatible compilers - Borland, CodeWarrior, Intel and others) you do:
__int64 biglit = 2i64; unsigned __int64 biglit2 = 2ui64;
If GCC has the ll and ull prefixes, you could create a macro for defining signed/unsigned 64-bit literals either where uint64_t is defined or in Boost.Config. e.g.:
uint64_t biglit = MAKE_UINT64_T( 2 );
Thanks for that information. I think what I'll want to do, for a first cut, is always produce 64-bit literals for 64-bit capable compilers. I'm going to wait until after the review period to start on fixing the 64-bit support. Since I don't have a local 64-bit compiler I'll be working blind and my first few efforts will be dead wrong. At an initial glance it looks like 64-bit support should be achievable without heroic efforts. But it certainly won't come along for free. Thanks again Reece. Scott Schurr
Scott Schurr wrote:
"Reece Dunn" <msclrhd@hotmail.com> wrote: Thanks for that information. I think what I'll want to do, for a first cut, is always produce 64-bit literals for 64-bit capable compilers.
Do you mean compilers that target 64-bit platforms like VC8.0-AMD64, or compilers that have 64-bit types enabled? (See below).
I'm going to wait until after the review period to start on fixing the 64-bit support. Since I don't have a local 64-bit compiler I'll be working blind and my first few efforts will be dead wrong.
The 32-bit microsoft compiler has support for 64-bit literals if you have version 7.0 or above handy (6.0 might have this, but I haven't checked). You will need to enable language extensions. I am not sure about the other compilers, though. It should be possible to test the 64-bit stuff on a 32-bit compiler like VC7 with MS language extensions, or even GCC. You may get warnings when converting a 64-bit type to a 32-bit type, or even a 32-bit type to a 16-bit type. However, the solution for this is: long num = long( 2i64 ); ^^^^ Tell the compiler that we want this 64- to 32-bit conversion.
At an initial glance it looks like 64-bit support should be achievable without heroic efforts. But it certainly won't come along for free.
Thanks again Reece.
No problem. - Reece
participants (2)
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Reece Dunn -
Scott Schurr